<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right" class="breadcrumb">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区 -->
    <el-card class="box-card">
      <!-- 搜索与添加区 -->
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query"
          clearable @clear="getUserList" class="input-with-select">
            <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible=true">添加用户</el-button>
        </el-col>
      </el-row>
      <!-- 用户列表区 -->
      <el-table :data="userlist" style="width: 100%" border stripe>
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column prop="username" label="姓名"></el-table-column>
        <el-table-column prop="email" label="邮箱"> </el-table-column>
        <el-table-column prop="mobile" label="电话"> </el-table-column>
        <el-table-column prop="role_name" label="角色"> </el-table-column>
        <el-table-column prop="mg_state" label="状态">
          <template slot-scope="scope">
            <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)"></el-switch>
          </template>
        </el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope" width='180px'>
            <!-- 修改按钮 -->
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"></el-button>
            <!-- 删除 -->
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.id)"></el-button>
            <!-- 分配角色 -->
            <el-tooltip class="item" effect="dark" content="分配角色" placement="top" :enterable="false">
                <el-button type="warning" icon="el-icon-setting" 
                @click="setRole(scope.row)" size="mini"></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页区域 -->
      <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="queryInfo.pagenum"
      :page-sizes="[1, 2, 5, 10]"
      :page-size="queryInfo.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total">
    </el-pagination>
    </el-card>
    <!-- 添加用户的对话框 -->
    <el-dialog
    title="添加用户"
    @close="addDialogClosed"
    :visible.sync="addDialogVisible"
    width="50%">
    <!-- 内容主体区 -->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
            <el-form-item label="用户名" prop="username">
                <el-input v-model="addForm.username"></el-input>
            </el-form-item>
            <el-form-item label="密码" prop="password">
                <el-input v-model="addForm.password"></el-input>
            </el-form-item>
            <el-form-item label="邮箱" prop="email">
                <el-input v-model="addForm.email"></el-input>
            </el-form-item>
            <el-form-item label="手机" prop="mobile">
                <el-input v-model="addForm.mobile"></el-input>
            </el-form-item>
        </el-form>
        <!-- 底部区 -->
        <span slot="footer" class="dialog-footer">
            <el-button @click="addDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addUser">确 定</el-button>
        </span>
    </el-dialog>
    <!-- 修改用户的对话框 -->
    <el-dialog
    title="修改用户"
    @close="editDialogClosed"
    :visible.sync="editDialogVisible"
    width="50%">
      <el-form ref="editFormRef" :model="editForm" :rules="addFormRules" label-width="70px">
          <el-form-item label="用户名">
              <el-input v-model="editForm.username" disabled></el-input>
          </el-form-item>
          <el-form-item label="邮箱" prop="email">
              <el-input v-model="editForm.email"></el-input>
          </el-form-item>
          <el-form-item label="手机" prop="mobile">
              <el-input v-model="editForm.mobile"></el-input>
          </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配角色的对话框 -->
    <el-dialog
    title="分配角色"
    :visible.sync="setRoleDialogVisible"
    width="50%">
      <div>
        <p>当前的用户：{{userInfo.username}}</p>
        <p>当前的角色：{{userInfo.role_name}}</p>
        <p>分配新角色：
            <el-select v-model="selectedRoleId" placeholder="请选择">
              <el-option
                v-for="item in rolesList"
                :key="item.id"
                :label="item.roleName"
                :value="item.id">
              </el-option>
            </el-select>
        </p>
      </div>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
      </span>
  </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Users',
  data() {
    //   验证邮箱的规则
    var checkEmail=(rule,value,cb)=>{
        // 验证邮箱的正则表达式
        const regEmail=/^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/
        if(regEmail.test(value)){
            return cb()
        }
        cb(new Error('请输入合法的邮箱'))
    };
    // 验证手机号的规则
    var checkMobile=(rule,value,cb)=>{
        // 验证手机号的正则表达式
        const regMobile=/^(0|86|17951)?(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$/
        if(regMobile.test(value)){
            return cb()
        }
        cb(new Error('请输入合法的手机号'))
    };
    
    return {
      queryInfo: {//   获取用户列表的参数对象
        query: '',
        pagenum: 1,         //当前页数
        pagesize: 2,        //当前每页显示多少条数据
      },
      userlist: [],
      total: 0,
      addDialogVisible:false,       //控制添加用户对话框的显示与隐藏
      addForm:{     //被添加的用户的数据
          username:'',
          password:'',
          email:'',
          mobile:'',
      },       
      addFormRules:{        //添加表单的验证规则对象
        username:[
            { required: true, message: '请输入用户名', trigger: 'blur' },
            { min: 3, max: 10, message: '用户名长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password:[
            { required: true, message: '请输入用户名', trigger: 'blur' },
            { min: 6, max: 15, message: '密码长度在 6 到 15 个字符', trigger: 'blur' }
        ],
        email:[
            { required: true, message: '请输入邮箱', trigger: 'blur' },
            { validator: checkEmail, trigger: 'blur'}
        ],
        mobile:[
            { required: true,  message:'请输入手机号', trigger: 'blur' },
            { validator: checkMobile, trigger: 'blur'}
        ]
      },
      editDialogVisible:false,      //控制修改用户对话框的显示与隐藏   
      editForm:{},     //查询到的用户对象      
      // 控制分配角色对话框的显示与隐藏
      setRoleDialogVisible:false,    
      // 需要被分配角色的用户信息
      userInfo:{},
      // 所有角色的列表
      rolesList:{},
      // 已选中的角色id值
      selectedRoleId:'',
    }
  },
  created() {
    this.getUserList()
  },
  methods: {
    //   渲染页面
    async getUserList() {
      const { data: res } = await this.$http.get('users', {
        params: this.queryInfo,
      })
      if (res.meta.status !== 200) return this.$message.error('失败了')
      this.userlist = res.data.users
      this.total = res.data.total
      console.log(res)
    },
    // 监听pagesize改变的事件
    handleSizeChange(newSize){
        this.queryInfo.pagesize=newSize;
        this.getUserList();
    },
    //监听页码值改变的事件
    handleCurrentChange(newPage){
        this.queryInfo.pagenum=newPage;
        this.getUserList();
    },
    // 监听switch开关状态的改变
    async userStateChanged(userinfo){
        const {data:res}=await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
        if(res.meta.status!==200) {
            userinfo.mg_state=!userinfo.mg_state;
            return this.$message.error('更新用户状态失败')
        }
        this.$message.success('更新用户状态成功')
    },
    // 监听添加用户对话框的关闭事件
    addDialogClosed(){
        this.$refs.addFormRef.resetFields();
    },
    // 点击按钮，添加新用户
    addUser(){
        this.$refs.addFormRef.validate(async valid=>{
            if(!valid) return;
            // 可以发起添加用户的网络请求
            const {data:res}=await this.$http.post('users',this.addForm);
            if(res.meta.status!==201){
                return this.$message.error('添加用户失败')
            }
            this.$message.success('添加用户成功！')
            // 隐藏添加用户的对话框
            this.addDialogVisible=false;
            // 重新获取用户列表数据
            this.getUserList();

        })
    },
    // 展示编辑用户的对话框
    async showEditDialog(id){
        // console.log(id);
        const {data:res}=await this.$http.get('users/'+id)
        if(res.meta.status!==200){
            return this.$message.error('查询用户信息失败')
        }
        this.editForm=res.data;
        this.editDialogVisible=true;
    },
    // 监听修改用户对话框的关闭事件
    editDialogClosed(){
        this.$refs.editFormRef.resetFields();
    },
    // 修改用户信息并提交
    editUserInfo(){
        this.$refs.editFormRef.validate(async valid=>{
            if(!valid) return;
            const {data:res}=await this.$http.put('users/'+this.editForm.id,
            {email:this.editForm.email,mobile:this.editForm.mobile});
            if(res.meta.status!==200){
                return this.$message.error('更新用户信息失败')
            }

            // 关闭对话框
            this.editDialogVisible=false;
            // 刷新数据列表
            this.getUserList();
            // 提示修改信息成功
            this.$message.success('更新用户信息成功');
        })
    },
    // 根据id删除对应的用户信息
    async removeUserById(id){
        // 弹框询问用户是否删除数据
         const confirmResult=await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err);
        // 如果用户确认删除则返回字符串 confirm
        // 如果用户取消删除则返回字符串 cancel
        if(confirmResult !=='confirm') return this.$message.info('已取消删除');
        // 删除用户
        const {data:res}=await this.$http.delete('users/'+id)
        if(res.meta.status!==200) return this.$message.error('删除用户失败');
        this.$message.success('删除用户成功');
        this.getUserList();
    },
    // 展示分配角色的对话框
    async setRole(userInfo){
      this.userInfo=userInfo;
      // 在展示对话框之前获取所有角色的列表
      const {data:res}=await this.$http.get('roles');
      if(res.meta.status!==200) return this.$message.error('获取角色列表失败');
      // 所有的角色列表
      this.rolesList=res.data;
      this.selectedRoleId='';
      this.setRoleDialogVisible=true;
    },
    // 点击确认按钮分配角色
    async saveRoleInfo(){
      if(!this.selectedRoleId) return this.$message.error('请选择要分配的角色');
      const {data:res}=await this.$http.put(`users/${this.userInfo.id}/role`,
      {rid:this.selectedRoleId});
      if(res.meta.status!==200) return this.$message.error('更新角色失败');
      this.$message.success('更新角色成功');
      this.getUserList();
      this.setRoleDialogVisible = false;
      this.selectedRoleId='';
    }
    
  },
}
</script>

<style lang="less" scoped>
</style>>
